text: //
  //  NatTransfer.h
  //
  //  Created by huangyake on 17/1/7.
  //  Copyright © 2017 Instapp. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  @interface NatTransfer : NSObject
  
  typedef void (^NatCallback)(id error, id result);
  - (void)download:(NSDictionary *)params :(NatCallback)callback;
  - (void)upload:(NSDictionary *)params :(NatCallback)callback;
  
  @end
  